ALEXANDRIA, Va., April 15 -- United States Patent no. 12,599,704, issued on April 14, was assigned to FUJIFILM Corp. (Tokyo).

"Endoscopic flexible tube, endoscopic medical apparatus, and endoscopic-flexible-tube-base-covering material" was invented by Kazushi Furukawa (Kanagawa, Japan) and Yoshihiro Nakai (Kanagawa, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "An endoscopic flexible tube including a sleeve-shaped flexible-tube base having flexibility, and a cover layer for the flexible-tube base, wherein the cover layer contains (a) at least one of (a1) a polyester resin having a naphthalene structure or (a2) a polyester elastomer having a naphthalene structure, and (b) at least one of (b1) a thermop...